You have no idea you are speaking of one of the most difficult
theology of Christianity, do you? Do not dismiss it like primary
school maths.
1. Son of God is the second godhead of the Trinity, and divine. No
contradiction, when Jesus said he is the Son of God.
2. 'God tell him to die'? Sounds very wrong. Jesus is divine
himself. His will is according to the Father's. No
contradiction.
3. 'He talk to himself'? Sounds very wrong again. He was
communicating to the Father in heaven.
Yet throughout all these, there remains only ONE God. I know my
explantions do not suffice, but if you had bothered to know the
truth, you would not have dismissed it so quickly.